Brochure

Heating, ventilation and air conditioning - room temperature control
Room temperature controllers with integrated sensing
i-system
238
Siemens Switzerland Ltd www.siemens.com/gamma 2021
Smart Infrastructure
7
Base modules with KNX for CO2 measurement
 Base module with maintenance and recalibration-free CO2 sensor to plug onto a front module
 1 analog input to connect temperature sensors with NTC 10k sensing element to measure room, floor,
or ceiling temperature
 2 multifunctional binary inputs to connect window contacts or buttons
 Power supply via KNX bus, bus load < 5 mA
 Communication: KNX S-Mode, KNX PL-Link
 Ventilation control across 3 settable switching steps for relative humidity & CO2 concentration, and 3
switching signal objects On/Off, or one positioning signal object 0…100% to control a ventilation actor
 Temperature control as continuous control (PID algorithm) for pure heating operation, heating and
cooling operation, and adjustable positioning variable as continuous positioning signal 0…100%, or as
pulse-width modulated (PWM) switching signal On/Off
 Via setpoints for room temperature and relative humidity, and CO2 concentration, adjustable via KNX
bus
 Adjustable commissioning and control parameters
 Integrated bus coupler with programming button and LED
Data sheet
N1411
Voltage supply
KNX bus
Measuring range
CO2: 0...5000 ppm
Analog inputs, number
1
Analog inputs
Passive temperature sensor NTC 10k
Digital inputs, number
2
Digital inputs
Potential-free contacts
Warranty
5 Years
AQR2576..
Range overview AQR2576..
Mechanical design
Dimensions
(WxHxD)
[mm]
Stock no.
Product no.
EU (CEE/VDE)
71 x 71 x 45
S55720-S207
AQR2576NF
IT (3 Modular)
71 x 71 x 45
S55720-S209
AQR2576NG
UK (British Standard)
71 x 71 x 45
S55720-S208
AQR2576NH
US (UL)
64 x 110 x 45
S55720-S210
AQR2576NJ